[plt-dev] Release Announcement for v4.2.2

At Mon, 28 Sep 2009 16:02:27 -0400, Eli Barzilay wrote:
> * scribble reorganization

* New Scribble libraries and documentation make it easier to get
  started with Scribble, especially for uses other than PLT
  documentation. DrScheme now supports @-expression coloring and
  tabbing for Scribble languages and `#lang at-exp ...'.

> * Printout of syntax objects (and `print-syntax-width')
> * new core function `file-or-directory-identity'
> * New `scheme/unsafe/ops' module
> * `slideshow/play'

Too minor to mention. (Support for unsafe operations might evolve into
something worth mentioning, but it's not yet there.)